To be without desire is to be content. But contentment is not happiness. And in contentment there is no progress. Happiness is to desire something, to work for it, and to obtain at least a part of it.... Therefore, while yet you have the strength, cherish a desire to do some useful work in your little corner of the world, and have the steadfastness to labour. For this is the way to the happy life; with health and endearing ties, it is the way to the glorious life.